In Situ Laboratory-Based Transmission X-Ray Microscopy and Tomography of Material Deformation at the Nanoscale

B. M. Patterson, N. L. Cordes, K. Henderson, J. C.E. Mertens, A. J. Clarke, B. Hornberger, A. Merkle, S. Etchin, A. Tkachuk, M. Leibowitz, D. Trapp, W. Qiu, B. Zhang, H. Bale, X. Lu, R. Hartwell, P. J. Withers, R. S. Bradley

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Whether it be the mechanical response of biomaterials or the crack propagation pathways within metal alloys, observing how damage occurs (both spatially and temporally) is critical to understanding materials behavior. Here, nanoscale transmission X-ray microscopy (TXRM) is used to follow the initiation and propagation of damage during quasi-static mechanical testing of natural, crystalline, and metallic materials. The coupling of a novel load stage and TXRM for in situ mechanical testing enables both radiographic (2D) and tomographic (3D) characterization. With an imaging resolution down to 50 nm during uniaxial nanoindentation, compression, or tension, TXRM is ideally suited for the characterization of materials degradation. Several applications are demonstrated including nanoindentation of dentin, compression of a single crystal of high explosive, and tensile testing of both beetle cuticle and Al-Cu alloy. These experiments highlight the capability of the new experimental fixture to provide enhanced insight on material performance through four dimensional (3D + time) observation and analysis.

    Original languageEnglish
    Pages (from-to)1585-1597
    Number of pages13
    JournalExperimental Mechanics
    Volume56
    Issue number9
    Early online date11 Aug 2016
    DOIs
    Publication statusPublished - 1 Nov 2016

    Keywords

    • 4D imaging
    • Fracture
    • Microtesting
    • Nanotomography
    • X-ray computed tomography (CT)

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